package com.mdc;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author chengfan
 * @create 2017-05-09 下午9:51
 */
public class Interceptor1 implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler)
            throws Exception {
        System.out.println("Inter1.preHandle在请求处理之前(Controller方法调用之前)调用");
        return true; //只有返回true才会继续向下执行，返回false取消当前请求
    }

    @Override
    public void postHandle(HttpServletRequest request,
                           HttpServletResponse response,
                           Object handler,
                           ModelAndView modelAndView)
            throws Exception {
        System.out.println("Inter1.postHandle在请求处理之后(Controller方法调用之后)和在视图被渲染之前调用");
    }

    @Override
    public void afterCompletion(HttpServletRequest request,
                                HttpServletResponse response,
                                Object handler, Exception ex)
            throws Exception {
        System.out.println("Inter1.afterCompletion在整个请求结束之后被调用，也就是在DispatcherServlet渲染了对应的视图之后执行(主要用于资源清理工作)");
    }
}
